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专利名称：COMPUTER INTERFACE
发明人：STEVEN P. DAVIES,WILLIAM A. RICHARDS申请号：AU4883990申请日：19900125公开号：AU627543B2公开日：19920827
摘要：Computer interface apparatus which provides for an efficient computerinterface that transfers control and data signals using a variety of communicationsprotocols between a signal processor and external devices coupled thereto. The
interface (11) comprises a plurality of control and data transfer ports, including one serial(120) and four configurable parallel ports (122, 124, 126, 128). A plurality of controllers(130, 132) interface with the signal processor to direct the flow of control and datasignals between devices. In addition, and in order to increase the speed of operation ofthe interface, circuitry is also disclosed which controls tristate buffers on the control anddata buses coupled to the serial and parallel ports (120, 122, 124, 126, 128), whichcircuitry provides for open-collector characteristics, without sacrificing tristate bufferspeed.
申请人：HUGHES AIRCRAFT COMPANY
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